#include "clar_libgit2.h"
#include "index.h"
#include "git2/sys/index.h"
#include "git2/repository.h"
#include "../reset/reset_helpers.h"

static git_repository *repo;
static git_index *repo_index;

#define TEST_REPO_PATH "mergedrepo"
#define TEST_INDEX_PATH TEST_REPO_PATH "/.git/index"

#define ONE_ANCESTOR_OID "478871385b9cd03908c5383acfd568bef023c6b3"
#define ONE_OUR_OID "4458b8bc9e72b6c8755ae456f60e9844d0538d8c"
#define ONE_THEIR_OID "8b72416545c7e761b64cecad4f1686eae4078aa8"

#define TWO_ANCESTOR_OID "9d81f82fccc7dcd7de7a1ffead1815294c2e092c"
#define TWO_OUR_OID "8f3c06cff9a83757cec40c80bc9bf31a2582bde9"
#define TWO_THEIR_OID "887b153b165d32409c70163e0f734c090f12f673"

/* Fixture setup and teardown */
void test_index_reuc__initialize(void)
{
	repo = cl_git_sandbox_init("mergedrepo");
	git_repository_index(&repo_index, repo);
}

void test_index_reuc__cleanup(void)
{
	git_index_free(repo_index);
	repo_index = NULL;

	cl_git_sandbox_cleanup();
}

void test_index_reuc__add(void)
{
	git_oid ancestor_oid, our_oid, their_oid;
	const git_index_reuc_entry *reuc;

	git_oid_from_string(&ancestor_oid, ONE_ANCESTOR_OID, GIT_OID_SHA1);
	git_oid_from_string(&our_oid, ONE_OUR_OID, GIT_OID_SHA1);
	git_oid_from_string(&their_oid, ONE_THEIR_OID, GIT_OID_SHA1);

	cl_git_pass(git_index_reuc_add(repo_index, "newfile.txt",
		0100644, &ancestor_oid,
		0100644, &our_oid,
		0100644, &their_oid));

	cl_assert(reuc = git_index_reuc_get_bypath(repo_index, "newfile.txt"));

	cl_assert_equal_s("newfile.txt", reuc->path);
	cl_assert(reuc->mode[0] == 0100644);
	cl_assert(reuc->mode[1] == 0100644);
	cl_assert(reuc->mode[2] == 0100644);
	cl_assert_equal_oid(&reuc->oid[0], &ancestor_oid);
	cl_assert_equal_oid(&reuc->oid[1], &our_oid);
	cl_assert_equal_oid(&reuc->oid[2], &their_oid);

	cl_git_pass(git_index_write(repo_index));
}

void test_index_reuc__add_no_ancestor(void)
{
	git_oid ancestor_oid, our_oid, their_oid;
	const git_index_reuc_entry *reuc;

	memset(&ancestor_oid, 0x0, sizeof(git_oid));
	git_oid_from_string(&our_oid, ONE_OUR_OID, GIT_OID_SHA1);
	git_oid_from_string(&their_oid, ONE_THEIR_OID, GIT_OID_SHA1);

	cl_git_pass(git_index_reuc_add(repo_index, "newfile.txt",
		0, NULL,
		0100644, &our_oid,
		0100644, &their_oid));

	cl_assert(reuc = git_index_reuc_get_bypath(repo_index, "newfile.txt"));

	cl_assert_equal_s("newfile.txt", reuc->path);
	cl_assert(reuc->mode[0] == 0);
	cl_assert(reuc->mode[1] == 0100644);
	cl_assert(reuc->mode[2] == 0100644);
	cl_assert_equal_oid(&reuc->oid[0], &ancestor_oid);
	cl_assert_equal_oid(&reuc->oid[1], &our_oid);
	cl_assert_equal_oid(&reuc->oid[2], &their_oid);

	cl_git_pass(git_index_write(repo_index));
}

void test_index_reuc__read_bypath(void)
{
	const git_index_reuc_entry *reuc;
	git_oid oid;

	cl_assert_equal_i(2, git_index_reuc_entrycount(repo_index));

	cl_assert(reuc = git_index_reuc_get_bypath(repo_index, "two.txt"));

	cl_assert_equal_s("two.txt", reuc->path);
	cl_assert(reuc->mode[0] == 0100644);
	cl_assert(reuc->mode[1] == 0100644);
	cl_assert(reuc->mode[2] == 0100644);
	git_oid_from_string(&oid, TWO_ANCESTOR_OID, GIT_OID_SHA1);
	cl_assert_equal_oid(&reuc->oid[0], &oid);
	git_oid_from_string(&oid, TWO_OUR_OID, GIT_OID_SHA1);
	cl_assert_equal_oid(&reuc->oid[1], &oid);
	git_oid_from_string(&oid, TWO_THEIR_OID, GIT_OID_SHA1);
	cl_assert_equal_oid(&reuc->oid[2], &oid);

	cl_assert(reuc = git_index_reuc_get_bypath(repo_index, "one.txt"));

	cl_assert_equal_s("one.txt", reuc->path);
	cl_assert(reuc->mode[0] == 0100644);
	cl_assert(reuc->mode[1] == 0100644);
	cl_assert(reuc->mode[2] == 0100644);
	git_oid_from_string(&oid, ONE_ANCESTOR_OID, GIT_OID_SHA1);
	cl_assert_equal_oid(&reuc->oid[0], &oid);
	git_oid_from_string(&oid, ONE_OUR_OID, GIT_OID_SHA1);
	cl_assert_equal_oid(&reuc->oid[1], &oid);
	git_oid_from_string(&oid, ONE_THEIR_OID, GIT_OID_SHA1);
	cl_assert_equal_oid(&reuc->oid[2], &oid);
}

void test_index_reuc__ignore_case(void)
{
	const git_index_reuc_entry *reuc;
	git_oid oid;
	int index_caps;

	index_caps = git_index_caps(repo_index);

	index_caps &= ~GIT_INDEX_CAPABILITY_IGNORE_CASE;
	cl_git_pass(git_index_set_caps(repo_index, index_caps));

	cl_assert(!git_index_reuc_get_bypath(repo_index, "TWO.txt"));

	index_caps |= GIT_INDEX_CAPABILITY_IGNORE_CASE;
	cl_git_pass(git_index_set_caps(repo_index, index_caps));

	cl_assert_equal_i(2, git_index_reuc_entrycount(repo_index));

	cl_assert(reuc = git_index_reuc_get_bypath(repo_index, "TWO.txt"));

	cl_assert_equal_s("two.txt", reuc->path);
	cl_assert(reuc->mode[0] == 0100644);
	cl_assert(reuc->mode[1] == 0100644);
	cl_assert(reuc->mode[2] == 0100644);
	git_oid_from_string(&oid, TWO_ANCESTOR_OID, GIT_OID_SHA1);
	cl_assert_equal_oid(&reuc->oid[0], &oid);
	git_oid_from_string(&oid, TWO_OUR_OID, GIT_OID_SHA1);
	cl_assert_equal_oid(&reuc->oid[1], &oid);
	git_oid_from_string(&oid, TWO_THEIR_OID, GIT_OID_SHA1);
	cl_assert_equal_oid(&reuc->oid[2], &oid);
}

void test_index_reuc__read_byindex(void)
{
	const git_index_reuc_entry *reuc;
	git_oid oid;

	cl_assert_equal_i(2, git_index_reuc_entrycount(repo_index));

	cl_assert(reuc = git_index_reuc_get_byindex(repo_index, 0));

	cl_assert_equal_s("one.txt", reuc->path);
	cl_assert(reuc->mode[0] == 0100644);
	cl_assert(reuc->mode[1] == 0100644);
	cl_assert(reuc->mode[2] == 0100644);
	git_oid_from_string(&oid, ONE_ANCESTOR_OID, GIT_OID_SHA1);
	cl_assert_equal_oid(&reuc->oid[0], &oid);
	git_oid_from_string(&oid, ONE_OUR_OID, GIT_OID_SHA1);
	cl_assert_equal_oid(&reuc->oid[1], &oid);
	git_oid_from_string(&oid, ONE_THEIR_OID, GIT_OID_SHA1);
	cl_assert_equal_oid(&reuc->oid[2], &oid);

	cl_assert(reuc = git_index_reuc_get_byindex(repo_index, 1));

	cl_assert_equal_s("two.txt", reuc->path);
	cl_assert(reuc->mode[0] == 0100644);
	cl_assert(reuc->mode[1] == 0100644);
	cl_assert(reuc->mode[2] == 0100644);
	git_oid_from_string(&oid, TWO_ANCESTOR_OID, GIT_OID_SHA1);
	cl_assert_equal_oid(&reuc->oid[0], &oid);
	git_oid_from_string(&oid, TWO_OUR_OID, GIT_OID_SHA1);
	cl_assert_equal_oid(&reuc->oid[1], &oid);
	git_oid_from_string(&oid, TWO_THEIR_OID, GIT_OID_SHA1);
	cl_assert_equal_oid(&reuc->oid[2], &oid);
}

void test_index_reuc__updates_existing(void)
{
	const git_index_reuc_entry *reuc;
	git_oid ancestor_oid, our_oid, their_oid, oid;
	int index_caps;

	git_index_clear(repo_index);

	index_caps = git_index_caps(repo_index);

	index_caps |= GIT_INDEX_CAPABILITY_IGNORE_CASE;
	cl_git_pass(git_index_set_caps(repo_index, index_caps));

	git_oid_from_string(&ancestor_oid, TWO_ANCESTOR_OID, GIT_OID_SHA1);
	git_oid_from_string(&our_oid, TWO_OUR_OID, GIT_OID_SHA1);
	git_oid_from_string(&their_oid, TWO_THEIR_OID, GIT_OID_SHA1);

	cl_git_pass(git_index_reuc_add(repo_index, "two.txt",
		0100644, &ancestor_oid,
		0100644, &our_oid,
		0100644, &their_oid));

	cl_git_pass(git_index_reuc_add(repo_index, "TWO.txt",
		0100644, &our_oid,
		0100644, &their_oid,
		0100644, &ancestor_oid));

	cl_assert_equal_i(1, git_index_reuc_entrycount(repo_index));

	cl_assert(reuc = git_index_reuc_get_byindex(repo_index, 0));

	cl_assert_equal_s("TWO.txt", reuc->path);
	git_oid_from_string(&oid, TWO_OUR_OID, GIT_OID_SHA1);
	cl_assert_equal_oid(&reuc->oid[0], &oid);
	git_oid_from_string(&oid, TWO_THEIR_OID, GIT_OID_SHA1);
	cl_assert_equal_oid(&reuc->oid[1], &oid);
	git_oid_from_string(&oid, TWO_ANCESTOR_OID, GIT_OID_SHA1);
	cl_assert_equal_oid(&reuc->oid[2], &oid);
}

void test_index_reuc__remove(void)
{
	git_oid oid;
	const git_index_reuc_entry *reuc;

	cl_assert_equal_i(2, git_index_reuc_entrycount(repo_index));

	cl_git_pass(git_index_reuc_remove(repo_index, 0));
	cl_git_fail(git_index_reuc_remove(repo_index, 1));

	cl_assert_equal_i(1, git_index_reuc_entrycount(repo_index));

	cl_assert(reuc = git_index_reuc_get_byindex(repo_index, 0));

	cl_assert_equal_s("two.txt", reuc->path);
	cl_assert(reuc->mode[0] == 0100644);
	cl_assert(reuc->mode[1] == 0100644);
	cl_assert(reuc->mode[2] == 0100644);
	git_oid_from_string(&oid, TWO_ANCESTOR_OID, GIT_OID_SHA1);
	cl_assert_equal_oid(&reuc->oid[0], &oid);
	git_oid_from_string(&oid, TWO_OUR_OID, GIT_OID_SHA1);
	cl_assert_equal_oid(&reuc->oid[1], &oid);
	git_oid_from_string(&oid, TWO_THEIR_OID, GIT_OID_SHA1);
	cl_assert_equal_oid(&reuc->oid[2], &oid);
}

void test_index_reuc__write(void)
{
	git_oid ancestor_oid, our_oid, their_oid;
	const git_index_reuc_entry *reuc;

	git_index_clear(repo_index);

	/* Write out of order to ensure sorting is correct */
	git_oid_from_string(&ancestor_oid, TWO_ANCESTOR_OID, GIT_OID_SHA1);
	git_oid_from_string(&our_oid, TWO_OUR_OID, GIT_OID_SHA1);
	git_oid_from_string(&their_oid, TWO_THEIR_OID, GIT_OID_SHA1);

	cl_git_pass(git_index_reuc_add(repo_index, "two.txt",
		0100644, &ancestor_oid,
		0100644, &our_oid,
		0100644, &their_oid));

	git_oid_from_string(&ancestor_oid, ONE_ANCESTOR_OID, GIT_OID_SHA1);
	git_oid_from_string(&our_oid, ONE_OUR_OID, GIT_OID_SHA1);
	git_oid_from_string(&their_oid, ONE_THEIR_OID, GIT_OID_SHA1);

	cl_git_pass(git_index_reuc_add(repo_index, "one.txt",
		0100644, &ancestor_oid,
		0100644, &our_oid,
		0100644, &their_oid));

	cl_git_pass(git_index_write(repo_index));
	cl_assert_equal_i(2, git_index_reuc_entrycount(repo_index));

	/* ensure sort order was round-tripped correct */
	cl_assert(reuc = git_index_reuc_get_byindex(repo_index, 0));
	cl_assert_equal_s("one.txt", reuc->path);

	cl_assert(reuc = git_index_reuc_get_byindex(repo_index, 1));
	cl_assert_equal_s("two.txt", reuc->path);
}

static int reuc_entry_exists(void)
{
	return (git_index_reuc_get_bypath(repo_index, "newfile.txt") != NULL);
}

void test_index_reuc__cleaned_on_reset_hard(void)
{
	git_object *target;

	cl_git_pass(git_revparse_single(&target, repo, "3a34580"));

	test_index_reuc__add();
	cl_git_pass(git_reset(repo, target, GIT_RESET_HARD, NULL));
	cl_assert(reuc_entry_exists() == false);

	git_object_free(target);
}

void test_index_reuc__cleaned_on_reset_mixed(void)
{
	git_object *target;

	cl_git_pass(git_revparse_single(&target, repo, "3a34580"));

	test_index_reuc__add();
	cl_git_pass(git_reset(repo, target, GIT_RESET_MIXED, NULL));
	cl_assert(reuc_entry_exists() == false);

	git_object_free(target);
}

void test_index_reuc__retained_on_reset_soft(void)
{
	git_object *target;

	cl_git_pass(git_revparse_single(&target, repo, "3a34580"));

	cl_git_pass(git_reset(repo, target, GIT_RESET_HARD, NULL));

	test_index_reuc__add();
	cl_git_pass(git_reset(repo, target, GIT_RESET_SOFT, NULL));
	cl_assert(reuc_entry_exists() == true);

	git_object_free(target);
}

void test_index_reuc__cleaned_on_checkout_tree(void)
{
	git_oid oid;
	git_object *obj;
	git_checkout_options opts = GIT_CHECKOUT_OPTIONS_INIT;

	opts.checkout_strategy = GIT_CHECKOUT_FORCE;

	test_index_reuc__add();
	cl_git_pass(git_reference_name_to_id(&oid, repo, "refs/heads/master"));
	cl_git_pass(git_object_lookup(&obj, repo, &oid, GIT_OBJECT_ANY));
	cl_git_pass(git_checkout_tree(repo, obj, &opts));
	cl_assert(reuc_entry_exists() == false);

	git_object_free(obj);
}

void test_index_reuc__cleaned_on_checkout_head(void)
{
	git_checkout_options opts = GIT_CHECKOUT_OPTIONS_INIT;

	opts.checkout_strategy = GIT_CHECKOUT_FORCE;

	test_index_reuc__add();
	cl_git_pass(git_checkout_head(repo, &opts));
	cl_assert(reuc_entry_exists() == false);
}

void test_index_reuc__retained_on_checkout_index(void)
{
	git_checkout_options opts = GIT_CHECKOUT_OPTIONS_INIT;

	opts.checkout_strategy = GIT_CHECKOUT_FORCE;

	test_index_reuc__add();
	cl_git_pass(git_checkout_index(repo, repo_index, &opts));
	cl_assert(reuc_entry_exists() == true);
}
